<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style type="text/css">
		#box{width: 300px;
			height: 300px;
			background-color:rgba(20,200,200) ;
			opacity: 0.3;
		}
	</style>
</head>
<body>
	<div id="box">
		<img src="img/btn.jpg" width="150" >
	</div>
</body>
</html>
